| 2540900 | Tool joint | |||
| 2488566 | Pull rod | |||
| 2171217 | Metal packing ring for use with screwed pipe joints or couplings | |||
| 2155491 | Condenser tube seal | |||
| 1956264 | Fluid-tight joint | |||
| 1933117 | Method of and means for making pipe extensions | |||
| 1913246 | Splitproof tapered machine joint pipe | |||
| 1623843 | N/A | |||
| 1389542 | Leakproof joint | |||
| 0798507 | N/A | |||
| 0221864 | N/A |